Mode of riveting



9 J. D. STIRGKLER;

. MODE 0]? RIVETING.

No. 415,885, Patented Nov. 26, 1889.

UNITED STATES,

PATENT OFFICE.

JOHN D. STRICKLER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF, HOMER ROGERS, OF SAME PLACE, AND LEON O. DION, OF NATICK,

MASSACHUSETTS.

MODE OF RIVETING.

SPECIFICATION forming part of Letters Patent No. 415,885, dated November 26, 1889.

Application filed July 30,1889. Serial No. 319,173. (No model.)

To all whom it may concern.-

Be it known that I, J OHN D. STRICKLER, of Boston, in the county of Sufiolk and State of ltlassachusetts, have invented a new and use ful Improvement in the Process of Setting Rivets, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to methods of swaging 1o rivets, and has for its object the quick and effectual swaging of a perfect head or clinch upon a solid rivet whenin the material which it is designed to fasten.

In the manufacture of leather goods and I 5 others of kindred nature the necessity of rapidly and easily swaging the end of an inserted rivet, so as to form a good head or clinch without the use of a burr or washer, has brought out various devices, and rivets have been made with tubular and slotted shanks in order to accomplish this object.

My invention consists in a method of swaging a solid rivet by making in the end thereof an annular groove or incision around its central portion, then spreading the circumferential portion lying outside of said groove radially outward away from the central portion and turning it over to form the head or clinch. This process is fully illustrated in the drawings, in which- Figure 1 is a perspective of a rivet and a punch in position to operate; Fig. 2, a vertical section showing the punch as forced into the end of the rivet; Fig. 3, the punch with- .drawn from the rivet; Fig. 4, the header in position to operate on the punched rivet, which has had its central core removed; Fig. 5, the header and rivet after the operation. Figs. 3, 4, and 5 are partly in section.

Similar letters refer to similar parts of all the figures.

In carrying out my invention I use a solid rivet, which may be of the usual form, although I prefer that the shank have the rounded end shown at B, Fig. 1. A hollow punch A is adjusted and arranged by suitable mechanism to be forced into the end of the rivet, as seen in Fig. 2, thus spreading the circumferential portion thereof from a central core. Fig. 3 shows the rivet B as it is left by the operation of the punch A. To complete the operation, I prefer to remove the central core, leaving the rivet as in Fig.

4, and then bring down upon it the header D, (shownin Fig. 5,) which shows the circumferential portion closed down upon the stock C.

If desired, the central core may be left until after the header has done its work, in which case the header is made with a central bore,

as at D, Fig. 4, adapted to receive the said core and allow it to remain upright while the circumferential portion is flattened, when it may be readily broken or out off.

I have found that by this process of spreading only the circumferential portion of the rivet it seldom splits, but leaves a smooth head, hardly to be distinguished from the head on the other end of the rivet unless by its shape. 1

Ihave not shown any special mechanism for operating the punch and header used for carrying out my herein-described process, as both may be driven by the common method" that is, with a hammer-and while in practice it is more effectual to use some rapidlyworking press for this purpose, yet that forms no part of my present invention.

I claim- 1. The herein-described process of swaging the end of a solid rivet to form a head thereon, the same consisting in first making an annular incision or groove in the end of said rivet around the central portion thereof, spreading the circumferential portion lying outside the said groove radially outward away 8 5 from said central portion and then down ward toward the other end of the rivet or upon the stock in which it is inserted, substantially as set forth.

2. The herein-described process of swaging the end of a solid rivet to form a head thereon, the same consisting in first making an annular incision or groove in the end of said rivet around the central portion thereof, spreading the circumferential portion lying 5 outside said groove radially outward away from said central portion, then removing said central portion by cutting or breaking it away, and, lastly, bending the said circumferential portion downward upon the stock, substantially as specified.

3. The process of swaging the end of a solid rivet to form a head thereon, consisting in forcing a hollow punch upon and into the end of the rivet to be swaged, so as to make an annular groove therein around a central core, then bending the circumferential portion which is left outside the cutting-edge of the punch outward and away from said central core, then applying to the rivet end another tool adapted t) bend said circumferential portion outward and downward toward the other end of the rivet, substantially as specified.

4. The process of uniting two or morelayers of material by riveting, consisting, in passing through such layers a rivet so that its end will project therefrom, then forcing a hollow punch against and into the said projecting end, so that while a central core is left standing the circumferential portion is spread outward, away from said core, then removing said punch and applying a heading-tool adapted to still further spread said circumferential portion and flatten it down upon the material to be united, substantially as herein set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 2 9th day of July, A. D. 1889.

JOHN D. STRIOKLER.

Witnesses: I

STEPHEN MOORE, S. WALLACE MOORE, 

